1fa9e4066Sahrens /* 2fa9e4066Sahrens * CDDL HEADER START 3fa9e4066Sahrens * 4fa9e4066Sahrens * The contents of this file are subject to the terms of the 5ea8dc4b6Seschrock * Common Development and Distribution License (the "License"). 6ea8dc4b6Seschrock * You may not use this file except in compliance with the License. 7fa9e4066Sahrens * 8fa9e4066Sahrens * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9fa9e4066Sahrens * or http://www.opensolaris.org/os/licensing. 10fa9e4066Sahrens * See the License for the specific language governing permissions 11fa9e4066Sahrens * and limitations under the License. 12fa9e4066Sahrens * 13fa9e4066Sahrens * When distributing Covered Code, include this CDDL HEADER in each 14fa9e4066Sahrens * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15fa9e4066Sahrens * If applicable, add the following below this CDDL HEADER, with the 16fa9e4066Sahrens * fields enclosed by brackets "[]" replaced with your own identifying 17fa9e4066Sahrens * information: Portions Copyright [yyyy] [name of copyright owner] 18fa9e4066Sahrens * 19fa9e4066Sahrens * CDDL HEADER END 20fa9e4066Sahrens */ 21ad135b5dSChristopher Siden 22fa9e4066Sahrens /* 2306e0070dSMark Shellenbaum * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. 2494c2d0ebSMatthew Ahrens * Copyright (c) 2012, 2017 by Delphix. All rights reserved. 25bc9014e6SJustin Gibbs * Copyright (c) 2014 Spectra Logic Corporation, All rights reserved. 26fa9e4066Sahrens */ 27fa9e4066Sahrens 28fa9e4066Sahrens #include <sys/zfs_context.h> 29fa9e4066Sahrens #include <sys/dbuf.h> 30fa9e4066Sahrens #include <sys/dnode.h> 31fa9e4066Sahrens #include <sys/dmu.h> 32fa9e4066Sahrens #include <sys/dmu_tx.h> 33fa9e4066Sahrens #include <sys/dmu_objset.h> 34fa9e4066Sahrens #include <sys/dsl_dataset.h> 35fa9e4066Sahrens #include <sys/spa.h> 36bf16b11eSMatthew Ahrens #include <sys/range_tree.h> 3743466aaeSMax Grossman #include <sys/zfeature.h> 38fa9e4066Sahrens 39fa9e4066Sahrens static void 40fa9e4066Sahrens dnode_increase_indirection(dnode_t *dn, dmu_tx_t *tx) 41fa9e4066Sahrens { 42fa9e4066Sahrens dmu_buf_impl_t *db; 43c717a561Smaybee int txgoff = tx->tx_txg & TXG_MASK; 44c717a561Smaybee int nblkptr = dn->dn_phys->dn_nblkptr; 45c717a561Smaybee int old_toplvl = dn->dn_phys->dn_nlevels - 1; 46c717a561Smaybee int new_level = dn->dn_next_nlevels[txgoff]; 47fa9e4066Sahrens int i; 48fa9e4066Sahrens 49c717a561Smaybee rw_enter(&dn->dn_struct_rwlock, RW_WRITER); 50c717a561Smaybee 51c717a561Smaybee /* this dnode can't be paged out because it's dirty */ 52fa9e4066Sahrens ASSERT(dn->dn_phys->dn_type != DMU_OT_NONE); 53fa9e4066Sahrens ASSERT(RW_WRITE_HELD(&dn->dn_struct_rwlock)); 54c717a561Smaybee ASSERT(new_level > 1 && dn->dn_phys->dn_nlevels > 0); 55fa9e4066Sahrens 56fa9e4066Sahrens db = dbuf_hold_level(dn, dn->dn_phys->dn_nlevels, 0, FTAG); 57ea8dc4b6Seschrock ASSERT(db != NULL); 58c717a561Smaybee 59c717a561Smaybee dn->dn_phys->dn_nlevels = new_level; 60f82bfe17Sgw dprintf("os=%p obj=%llu, increase to %d\n", dn->dn_objset, 61f82bfe17Sgw dn->dn_object, dn->dn_phys->dn_nlevels); 62c717a561Smaybee 638df0bcf0SPaul Dagnelie /* transfer dnode's block pointers to new indirect block */ 648df0bcf0SPaul Dagnelie (void) dbuf_read(db, NULL, DB_RF_MUST_SUCCEED|DB_RF_HAVESTRUCT); 658df0bcf0SPaul Dagnelie ASSERT(db->db.db_data); 668df0bcf0SPaul Dagnelie ASSERT(arc_released(db->db_buf)); 678df0bcf0SPaul Dagnelie ASSERT3U(sizeof (blkptr_t) * nblkptr, <=, db->db.db_size); 688df0bcf0SPaul Dagnelie bcopy(dn->dn_phys->dn_blkptr, db->db.db_data, 698df0bcf0SPaul Dagnelie sizeof (blkptr_t) * nblkptr); 708df0bcf0SPaul Dagnelie arc_buf_freeze(db->db_buf); 71fa9e4066Sahrens 72fa9e4066Sahrens /* set dbuf's parent pointers to new indirect buf */ 73c717a561Smaybee for (i = 0; i < nblkptr; i++) { 74e57a022bSJustin T. Gibbs dmu_buf_impl_t *child = 75e57a022bSJustin T. Gibbs dbuf_find(dn->dn_objset, dn->dn_object, old_toplvl, i); 76c717a561Smaybee 77fa9e4066Sahrens if (child == NULL) 78fa9e4066Sahrens continue; 79744947dcSTom Erickson #ifdef DEBUG 80744947dcSTom Erickson DB_DNODE_ENTER(child); 81744947dcSTom Erickson ASSERT3P(DB_DNODE(child), ==, dn); 82744947dcSTom Erickson DB_DNODE_EXIT(child); 83744947dcSTom Erickson #endif /* DEBUG */ 84c717a561Smaybee if (child->db_parent && child->db_parent != dn->dn_dbuf) { 85c717a561Smaybee ASSERT(child->db_parent->db_level == db->db_level); 86c717a561Smaybee ASSERT(child->db_blkptr != 87c717a561Smaybee &dn->dn_phys->dn_blkptr[child->db_blkid]); 88fa9e4066Sahrens mutex_exit(&child->db_mtx); 89fa9e4066Sahrens continue; 90fa9e4066Sahrens } 91c717a561Smaybee ASSERT(child->db_parent == NULL || 92c717a561Smaybee child->db_parent == dn->dn_dbuf); 93c717a561Smaybee 94c717a561Smaybee child->db_parent = db; 95c717a561Smaybee dbuf_add_ref(db, child); 96c717a561Smaybee if (db->db.db_data) 97c717a561Smaybee child->db_blkptr = (blkptr_t *)db->db.db_data + i; 98c717a561Smaybee else 99c717a561Smaybee child->db_blkptr = NULL; 100c717a561Smaybee dprintf_dbuf_bp(child, child->db_blkptr, 101c717a561Smaybee "changed db_blkptr to new indirect %s", ""); 102fa9e4066Sahrens 103fa9e4066Sahrens mutex_exit(&child->db_mtx); 104fa9e4066Sahrens } 105fa9e4066Sahrens 106c717a561Smaybee bzero(dn->dn_phys->dn_blkptr, sizeof (blkptr_t) * nblkptr); 107fa9e4066Sahrens 108ea8dc4b6Seschrock dbuf_rele(db, FTAG); 109c717a561Smaybee 110c717a561Smaybee rw_exit(&dn->dn_struct_rwlock); 111fa9e4066Sahrens } 112fa9e4066Sahrens 11343466aaeSMax Grossman static void 114fa9e4066Sahrens free_blocks(dnode_t *dn, blkptr_t *bp, int num, dmu_tx_t *tx) 115fa9e4066Sahrens { 116cdb0ab79Smaybee dsl_dataset_t *ds = dn->dn_objset->os_dsl_dataset; 117fa9e4066Sahrens uint64_t bytesfreed = 0; 118fa9e4066Sahrens 119cdb0ab79Smaybee dprintf("ds=%p obj=%llx num=%d\n", ds, dn->dn_object, num); 120fa9e4066Sahrens 12143466aaeSMax Grossman for (int i = 0; i < num; i++, bp++) { 122fa9e4066Sahrens if (BP_IS_HOLE(bp)) 123fa9e4066Sahrens continue; 124fa9e4066Sahrens 125b24ab676SJeff Bonwick bytesfreed += dsl_dataset_block_kill(ds, bp, tx, B_FALSE); 12699653d4eSeschrock ASSERT3U(bytesfreed, <=, DN_USED_BYTES(dn->dn_phys)); 12743466aaeSMax Grossman 12843466aaeSMax Grossman /* 12943466aaeSMax Grossman * Save some useful information on the holes being 13043466aaeSMax Grossman * punched, including logical size, type, and indirection 13143466aaeSMax Grossman * level. Retaining birth time enables detection of when 13243466aaeSMax Grossman * holes are punched for reducing the number of free 13343466aaeSMax Grossman * records transmitted during a zfs send. 13443466aaeSMax Grossman */ 13543466aaeSMax Grossman 13643466aaeSMax Grossman uint64_t lsize = BP_GET_LSIZE(bp); 13743466aaeSMax Grossman dmu_object_type_t type = BP_GET_TYPE(bp); 13843466aaeSMax Grossman uint64_t lvl = BP_GET_LEVEL(bp); 13943466aaeSMax Grossman 140c717a561Smaybee bzero(bp, sizeof (blkptr_t)); 14143466aaeSMax Grossman 14243466aaeSMax Grossman if (spa_feature_is_active(dn->dn_objset->os_spa, 14343466aaeSMax Grossman SPA_FEATURE_HOLE_BIRTH)) { 14443466aaeSMax Grossman BP_SET_LSIZE(bp, lsize); 14543466aaeSMax Grossman BP_SET_TYPE(bp, type); 14643466aaeSMax Grossman BP_SET_LEVEL(bp, lvl); 14743466aaeSMax Grossman BP_SET_BIRTH(bp, dmu_tx_get_txg(tx), 0); 14843466aaeSMax Grossman } 149fa9e4066Sahrens } 150fa9e4066Sahrens dnode_diduse_space(dn, -bytesfreed); 151fa9e4066Sahrens } 152fa9e4066Sahrens 1539c9dc39aSek #ifdef ZFS_DEBUG 154fa9e4066Sahrens static void 155fa9e4066Sahrens free_verify(dmu_buf_impl_t *db, uint64_t start, uint64_t end, dmu_tx_t *tx) 156fa9e4066Sahrens { 157fa9e4066Sahrens int off, num; 158fa9e4066Sahrens int i, err, epbs; 159fa9e4066Sahrens uint64_t txg = tx->tx_txg; 160744947dcSTom Erickson dnode_t *dn; 161fa9e4066Sahrens 162744947dcSTom Erickson DB_DNODE_ENTER(db); 163744947dcSTom Erickson dn = DB_DNODE(db); 164744947dcSTom Erickson epbs = dn->dn_phys->dn_indblkshift - SPA_BLKPTRSHIFT; 165fa9e4066Sahrens off = start - (db->db_blkid * 1<<epbs); 166fa9e4066Sahrens num = end - start + 1; 167fa9e4066Sahrens 168fa9e4066Sahrens ASSERT3U(off, >=, 0); 169fa9e4066Sahrens ASSERT3U(num, >=, 0); 170fa9e4066Sahrens ASSERT3U(db->db_level, >, 0); 171744947dcSTom Erickson ASSERT3U(db->db.db_size, ==, 1 << dn->dn_phys->dn_indblkshift); 172fa9e4066Sahrens ASSERT3U(off+num, <=, db->db.db_size >> SPA_BLKPTRSHIFT); 173fa9e4066Sahrens ASSERT(db->db_blkptr != NULL); 174fa9e4066Sahrens 175fa9e4066Sahrens for (i = off; i < off+num; i++) { 176fa9e4066Sahrens uint64_t *buf; 177fa9e4066Sahrens dmu_buf_impl_t *child; 178c717a561Smaybee dbuf_dirty_record_t *dr; 179c717a561Smaybee int j; 180fa9e4066Sahrens 181fa9e4066Sahrens ASSERT(db->db_level == 1); 182fa9e4066Sahrens 183744947dcSTom Erickson rw_enter(&dn->dn_struct_rwlock, RW_READER); 184744947dcSTom Erickson err = dbuf_hold_impl(dn, db->db_level-1, 185a2cdcdd2SPaul Dagnelie (db->db_blkid << epbs) + i, TRUE, FALSE, FTAG, &child); 186744947dcSTom Erickson rw_exit(&dn->dn_struct_rwlock); 187fa9e4066Sahrens if (err == ENOENT) 188fa9e4066Sahrens continue; 189fa9e4066Sahrens ASSERT(err == 0); 190fa9e4066Sahrens ASSERT(child->db_level == 0); 191c717a561Smaybee dr = child->db_last_dirty; 192c717a561Smaybee while (dr && dr->dr_txg > txg) 193c717a561Smaybee dr = dr->dr_next; 194c717a561Smaybee ASSERT(dr == NULL || dr->dr_txg == txg); 195c717a561Smaybee 196c717a561Smaybee /* data_old better be zeroed */ 197c717a561Smaybee if (dr) { 198c717a561Smaybee buf = dr->dt.dl.dr_data->b_data; 199fa9e4066Sahrens for (j = 0; j < child->db.db_size >> 3; j++) { 200fa9e4066Sahrens if (buf[j] != 0) { 201fa9e4066Sahrens panic("freed data not zero: " 202fa9e4066Sahrens "child=%p i=%d off=%d num=%d\n", 203903a11ebSrh (void *)child, i, off, num); 204fa9e4066Sahrens } 205fa9e4066Sahrens } 206fa9e4066Sahrens } 207fa9e4066Sahrens 208fa9e4066Sahrens /* 209fa9e4066Sahrens * db_data better be zeroed unless it's dirty in a 210fa9e4066Sahrens * future txg. 211fa9e4066Sahrens */ 212fa9e4066Sahrens mutex_enter(&child->db_mtx); 213fa9e4066Sahrens buf = child->db.db_data; 214fa9e4066Sahrens if (buf != NULL && child->db_state != DB_FILL && 215c717a561Smaybee child->db_last_dirty == NULL) { 216fa9e4066Sahrens for (j = 0; j < child->db.db_size >> 3; j++) { 217fa9e4066Sahrens if (buf[j] != 0) { 218fa9e4066Sahrens panic("freed data not zero: " 219fa9e4066Sahrens "child=%p i=%d off=%d num=%d\n", 220903a11ebSrh (void *)child, i, off, num); 221fa9e4066Sahrens } 222fa9e4066Sahrens } 223fa9e4066Sahrens } 224fa9e4066Sahrens mutex_exit(&child->db_mtx); 225fa9e4066Sahrens 226ea8dc4b6Seschrock dbuf_rele(child, FTAG); 227fa9e4066Sahrens } 228744947dcSTom Erickson DB_DNODE_EXIT(db); 229fa9e4066Sahrens } 2309c9dc39aSek #endif 231fa9e4066Sahrens 232738e2a3cSPaul Dagnelie /* 233738e2a3cSPaul Dagnelie * We don't usually free the indirect blocks here. If in one txg we have a 234738e2a3cSPaul Dagnelie * free_range and a write to the same indirect block, it's important that we 235738e2a3cSPaul Dagnelie * preserve the hole's birth times. Therefore, we don't free any any indirect 236738e2a3cSPaul Dagnelie * blocks in free_children(). If an indirect block happens to turn into all 237738e2a3cSPaul Dagnelie * holes, it will be freed by dbuf_write_children_ready, which happens at a 238738e2a3cSPaul Dagnelie * point in the syncing process where we know for certain the contents of the 239738e2a3cSPaul Dagnelie * indirect block. 240738e2a3cSPaul Dagnelie * 241738e2a3cSPaul Dagnelie * However, if we're freeing a dnode, its space accounting must go to zero 242738e2a3cSPaul Dagnelie * before we actually try to free the dnode, or we will trip an assertion. In 243738e2a3cSPaul Dagnelie * addition, we know the case described above cannot occur, because the dnode is 244738e2a3cSPaul Dagnelie * being freed. Therefore, we free the indirect blocks immediately in that 245738e2a3cSPaul Dagnelie * case. 246738e2a3cSPaul Dagnelie */ 24743466aaeSMax Grossman static void 24843466aaeSMax Grossman free_children(dmu_buf_impl_t *db, uint64_t blkid, uint64_t nblks, 249738e2a3cSPaul Dagnelie boolean_t free_indirects, dmu_tx_t *tx) 250fa9e4066Sahrens { 251744947dcSTom Erickson dnode_t *dn; 252fa9e4066Sahrens blkptr_t *bp; 253fa9e4066Sahrens dmu_buf_impl_t *subdb; 2541a01181fSGeorge Wilson uint64_t start, end, dbstart, dbend; 2551a01181fSGeorge Wilson unsigned int epbs, shift, i; 256cdb0ab79Smaybee 257cdb0ab79Smaybee /* 258cdb0ab79Smaybee * There is a small possibility that this block will not be cached: 259cdb0ab79Smaybee * 1 - if level > 1 and there are no children with level <= 1 26043466aaeSMax Grossman * 2 - if this block was evicted since we read it from 26143466aaeSMax Grossman * dmu_tx_hold_free(). 262cdb0ab79Smaybee */ 263cdb0ab79Smaybee if (db->db_state != DB_CACHED) 264cdb0ab79Smaybee (void) dbuf_read(db, NULL, DB_RF_MUST_SUCCEED); 265fa9e4066Sahrens 266*99a19144SMatthew Ahrens /* 267*99a19144SMatthew Ahrens * If we modify this indirect block, and we are not freeing the 268*99a19144SMatthew Ahrens * dnode (!free_indirects), then this indirect block needs to get 269*99a19144SMatthew Ahrens * written to disk by dbuf_write(). If it is dirty, we know it will 270*99a19144SMatthew Ahrens * be written (otherwise, we would have incorrect on-disk state 271*99a19144SMatthew Ahrens * because the space would be freed but still referenced by the BP 272*99a19144SMatthew Ahrens * in this indirect block). Therefore we VERIFY that it is 273*99a19144SMatthew Ahrens * dirty. 274*99a19144SMatthew Ahrens * 275*99a19144SMatthew Ahrens * Our VERIFY covers some cases that do not actually have to be 276*99a19144SMatthew Ahrens * dirty, but the open-context code happens to dirty. E.g. if the 277*99a19144SMatthew Ahrens * blocks we are freeing are all holes, because in that case, we 278*99a19144SMatthew Ahrens * are only freeing part of this indirect block, so it is an 279*99a19144SMatthew Ahrens * ancestor of the first or last block to be freed. The first and 280*99a19144SMatthew Ahrens * last L1 indirect blocks are always dirtied by dnode_free_range(). 281*99a19144SMatthew Ahrens */ 282*99a19144SMatthew Ahrens VERIFY(BP_GET_FILL(db->db_blkptr) == 0 || db->db_dirtycnt > 0); 283*99a19144SMatthew Ahrens 2843f9d6ad7SLin Ling dbuf_release_bp(db); 28543466aaeSMax Grossman bp = db->db.db_data; 286fa9e4066Sahrens 287744947dcSTom Erickson DB_DNODE_ENTER(db); 288744947dcSTom Erickson dn = DB_DNODE(db); 289744947dcSTom Erickson epbs = dn->dn_phys->dn_indblkshift - SPA_BLKPTRSHIFT; 2901a01181fSGeorge Wilson ASSERT3U(epbs, <, 31); 291fa9e4066Sahrens shift = (db->db_level - 1) * epbs; 292fa9e4066Sahrens dbstart = db->db_blkid << epbs; 293fa9e4066Sahrens start = blkid >> shift; 294fa9e4066Sahrens if (dbstart < start) { 295fa9e4066Sahrens bp += start - dbstart; 296fa9e4066Sahrens } else { 297fa9e4066Sahrens start = dbstart; 298fa9e4066Sahrens } 299fa9e4066Sahrens dbend = ((db->db_blkid + 1) << epbs) - 1; 300fa9e4066Sahrens end = (blkid + nblks - 1) >> shift; 301fa9e4066Sahrens if (dbend <= end) 302fa9e4066Sahrens end = dbend; 30343466aaeSMax Grossman 304fa9e4066Sahrens ASSERT3U(start, <=, end); 305fa9e4066Sahrens 306fa9e4066Sahrens if (db->db_level == 1) { 3079c9dc39aSek FREE_VERIFY(db, start, end, tx); 30843466aaeSMax Grossman free_blocks(dn, bp, end-start+1, tx); 30943466aaeSMax Grossman } else { 3101a01181fSGeorge Wilson for (uint64_t id = start; id <= end; id++, bp++) { 31143466aaeSMax Grossman if (BP_IS_HOLE(bp)) 31243466aaeSMax Grossman continue; 31343466aaeSMax Grossman rw_enter(&dn->dn_struct_rwlock, RW_READER); 31443466aaeSMax Grossman VERIFY0(dbuf_hold_impl(dn, db->db_level - 1, 3151a01181fSGeorge Wilson id, TRUE, FALSE, FTAG, &subdb)); 31643466aaeSMax Grossman rw_exit(&dn->dn_struct_rwlock); 31743466aaeSMax Grossman ASSERT3P(bp, ==, subdb->db_blkptr); 31843466aaeSMax Grossman 319738e2a3cSPaul Dagnelie free_children(subdb, blkid, nblks, free_indirects, tx); 32043466aaeSMax Grossman dbuf_rele(subdb, FTAG); 32143466aaeSMax Grossman } 322fa9e4066Sahrens } 323fa9e4066Sahrens 324738e2a3cSPaul Dagnelie if (free_indirects) { 325738e2a3cSPaul Dagnelie for (i = 0, bp = db->db.db_data; i < 1 << epbs; i++, bp++) 326738e2a3cSPaul Dagnelie ASSERT(BP_IS_HOLE(bp)); 32743466aaeSMax Grossman bzero(db->db.db_data, db->db.db_size); 32843466aaeSMax Grossman free_blocks(dn, db->db_blkptr, 1, tx); 329fa9e4066Sahrens } 33043466aaeSMax Grossman 331744947dcSTom Erickson DB_DNODE_EXIT(db); 3326b4acc8bSahrens arc_buf_freeze(db->db_buf); 333fa9e4066Sahrens } 334fa9e4066Sahrens 335fa9e4066Sahrens /* 336f7170741SWill Andrews * Traverse the indicated range of the provided file 337fa9e4066Sahrens * and "free" all the blocks contained there. 338fa9e4066Sahrens */ 339fa9e4066Sahrens static void 340bf16b11eSMatthew Ahrens dnode_sync_free_range_impl(dnode_t *dn, uint64_t blkid, uint64_t nblks, 341738e2a3cSPaul Dagnelie boolean_t free_indirects, dmu_tx_t *tx) 342fa9e4066Sahrens { 343fa9e4066Sahrens blkptr_t *bp = dn->dn_phys->dn_blkptr; 344fa9e4066Sahrens int dnlevel = dn->dn_phys->dn_nlevels; 34543466aaeSMax Grossman boolean_t trunc = B_FALSE; 346fa9e4066Sahrens 347fa9e4066Sahrens if (blkid > dn->dn_phys->dn_maxblkid) 348fa9e4066Sahrens return; 349fa9e4066Sahrens 350fa9e4066Sahrens ASSERT(dn->dn_phys->dn_maxblkid < UINT64_MAX); 35143466aaeSMax Grossman if (blkid + nblks > dn->dn_phys->dn_maxblkid) { 352fa9e4066Sahrens nblks = dn->dn_phys->dn_maxblkid - blkid + 1; 35343466aaeSMax Grossman trunc = B_TRUE; 35443466aaeSMax Grossman } 355fa9e4066Sahrens 356fa9e4066Sahrens /* There are no indirect blocks in the object */ 357fa9e4066Sahrens if (dnlevel == 1) { 358fa9e4066Sahrens if (blkid >= dn->dn_phys->dn_nblkptr) { 359fa9e4066Sahrens /* this range was never made persistent */ 360fa9e4066Sahrens return; 361fa9e4066Sahrens } 362fa9e4066Sahrens ASSERT3U(blkid + nblks, <=, dn->dn_phys->dn_nblkptr); 36343466aaeSMax Grossman free_blocks(dn, bp + blkid, nblks, tx); 36443466aaeSMax Grossman } else { 36543466aaeSMax Grossman int shift = (dnlevel - 1) * 36643466aaeSMax Grossman (dn->dn_phys->dn_indblkshift - SPA_BLKPTRSHIFT); 36743466aaeSMax Grossman int start = blkid >> shift; 36843466aaeSMax Grossman int end = (blkid + nblks - 1) >> shift; 36943466aaeSMax Grossman dmu_buf_impl_t *db; 37043466aaeSMax Grossman 37143466aaeSMax Grossman ASSERT(start < dn->dn_phys->dn_nblkptr); 37243466aaeSMax Grossman bp += start; 37343466aaeSMax Grossman for (int i = start; i <= end; i++, bp++) { 37443466aaeSMax Grossman if (BP_IS_HOLE(bp)) 37543466aaeSMax Grossman continue; 37643466aaeSMax Grossman rw_enter(&dn->dn_struct_rwlock, RW_READER); 37743466aaeSMax Grossman VERIFY0(dbuf_hold_impl(dn, dnlevel - 1, i, 378a2cdcdd2SPaul Dagnelie TRUE, FALSE, FTAG, &db)); 37943466aaeSMax Grossman rw_exit(&dn->dn_struct_rwlock); 38043466aaeSMax Grossman 381738e2a3cSPaul Dagnelie free_children(db, blkid, nblks, free_indirects, tx); 38243466aaeSMax Grossman dbuf_rele(db, FTAG); 383fa9e4066Sahrens } 384fa9e4066Sahrens } 38543466aaeSMax Grossman 386fa9e4066Sahrens if (trunc) { 38743466aaeSMax Grossman dn->dn_phys->dn_maxblkid = blkid == 0 ? 0 : blkid - 1; 38843466aaeSMax Grossman 389fa9e4066Sahrens uint64_t off = (dn->dn_phys->dn_maxblkid + 1) * 390fa9e4066Sahrens (dn->dn_phys->dn_datablkszsec << SPA_MINBLOCKSHIFT); 391fa9e4066Sahrens ASSERT(off < dn->dn_phys->dn_maxblkid || 392fa9e4066Sahrens dn->dn_phys->dn_maxblkid == 0 || 393cdb0ab79Smaybee dnode_next_offset(dn, 0, &off, 1, 1, 0) != 0); 394fa9e4066Sahrens } 395fa9e4066Sahrens } 396fa9e4066Sahrens 397bf16b11eSMatthew Ahrens typedef struct dnode_sync_free_range_arg { 398bf16b11eSMatthew Ahrens dnode_t *dsfra_dnode; 399bf16b11eSMatthew Ahrens dmu_tx_t *dsfra_tx; 400738e2a3cSPaul Dagnelie boolean_t dsfra_free_indirects; 401bf16b11eSMatthew Ahrens } dnode_sync_free_range_arg_t; 402bf16b11eSMatthew Ahrens 403bf16b11eSMatthew Ahrens static void 404bf16b11eSMatthew Ahrens dnode_sync_free_range(void *arg, uint64_t blkid, uint64_t nblks) 405bf16b11eSMatthew Ahrens { 406bf16b11eSMatthew Ahrens dnode_sync_free_range_arg_t *dsfra = arg; 407bf16b11eSMatthew Ahrens dnode_t *dn = dsfra->dsfra_dnode; 408bf16b11eSMatthew Ahrens 409bf16b11eSMatthew Ahrens mutex_exit(&dn->dn_mtx); 410738e2a3cSPaul Dagnelie dnode_sync_free_range_impl(dn, blkid, nblks, 411738e2a3cSPaul Dagnelie dsfra->dsfra_free_indirects, dsfra->dsfra_tx); 412bf16b11eSMatthew Ahrens mutex_enter(&dn->dn_mtx); 413bf16b11eSMatthew Ahrens } 414bf16b11eSMatthew Ahrens 415ea8dc4b6Seschrock /* 416f7170741SWill Andrews * Try to kick all the dnode's dbufs out of the cache... 417ea8dc4b6Seschrock */ 4181934e92fSmaybee void 4191934e92fSmaybee dnode_evict_dbufs(dnode_t *dn) 420ea8dc4b6Seschrock { 421bc9014e6SJustin Gibbs dmu_buf_impl_t db_marker; 422bc9014e6SJustin Gibbs dmu_buf_impl_t *db, *db_next; 423c543ec06Sahrens 424bc9014e6SJustin Gibbs mutex_enter(&dn->dn_dbufs_mtx); 425bc9014e6SJustin Gibbs for (db = avl_first(&dn->dn_dbufs); db != NULL; db = db_next) { 426c543ec06Sahrens 427744947dcSTom Erickson #ifdef DEBUG 428bc9014e6SJustin Gibbs DB_DNODE_ENTER(db); 429bc9014e6SJustin Gibbs ASSERT3P(DB_DNODE(db), ==, dn); 430bc9014e6SJustin Gibbs DB_DNODE_EXIT(db); 431744947dcSTom Erickson #endif /* DEBUG */ 432ea8dc4b6Seschrock 433bc9014e6SJustin Gibbs mutex_enter(&db->db_mtx); 434bc9014e6SJustin Gibbs if (db->db_state != DB_EVICTING && 435bc9014e6SJustin Gibbs refcount_is_zero(&db->db_holds)) { 436bc9014e6SJustin Gibbs db_marker.db_level = db->db_level; 437bc9014e6SJustin Gibbs db_marker.db_blkid = db->db_blkid; 438bc9014e6SJustin Gibbs db_marker.db_state = DB_SEARCH; 439bc9014e6SJustin Gibbs avl_insert_here(&dn->dn_dbufs, &db_marker, db, 440bc9014e6SJustin Gibbs AVL_BEFORE); 441bc9014e6SJustin Gibbs 442dcbf3bd6SGeorge Wilson dbuf_destroy(db); 443bc9014e6SJustin Gibbs 444bc9014e6SJustin Gibbs db_next = AVL_NEXT(&dn->dn_dbufs, &db_marker); 445bc9014e6SJustin Gibbs avl_remove(&dn->dn_dbufs, &db_marker); 446bc9014e6SJustin Gibbs } else { 447d2058105SJustin T. Gibbs db->db_pending_evict = TRUE; 448bc9014e6SJustin Gibbs mutex_exit(&db->db_mtx); 449bc9014e6SJustin Gibbs db_next = AVL_NEXT(&dn->dn_dbufs, db); 450ea8dc4b6Seschrock } 451bc9014e6SJustin Gibbs } 452bc9014e6SJustin Gibbs mutex_exit(&dn->dn_dbufs_mtx); 453c543ec06Sahrens 454cd485b49SJustin T. Gibbs dnode_evict_bonus(dn); 455cd485b49SJustin T. Gibbs } 456cd485b49SJustin T. Gibbs 457cd485b49SJustin T. Gibbs void 458cd485b49SJustin T. Gibbs dnode_evict_bonus(dnode_t *dn) 459cd485b49SJustin T. Gibbs { 460ea8dc4b6Seschrock rw_enter(&dn->dn_struct_rwlock, RW_WRITER); 461d2058105SJustin T. Gibbs if (dn->dn_bonus != NULL) { 462d2058105SJustin T. Gibbs if (refcount_is_zero(&dn->dn_bonus->db_holds)) { 463d2058105SJustin T. Gibbs mutex_enter(&dn->dn_bonus->db_mtx); 464dcbf3bd6SGeorge Wilson dbuf_destroy(dn->dn_bonus); 465d2058105SJustin T. Gibbs dn->dn_bonus = NULL; 466d2058105SJustin T. Gibbs } else { 467d2058105SJustin T. Gibbs dn->dn_bonus->db_pending_evict = TRUE; 468d2058105SJustin T. Gibbs } 469ea8dc4b6Seschrock } 470ea8dc4b6Seschrock rw_exit(&dn->dn_struct_rwlock); 471ea8dc4b6Seschrock } 472ea8dc4b6Seschrock 473c717a561Smaybee static void 474c717a561Smaybee dnode_undirty_dbufs(list_t *list) 475fa9e4066Sahrens { 476c717a561Smaybee dbuf_dirty_record_t *dr; 477fa9e4066Sahrens 478c717a561Smaybee while (dr = list_head(list)) { 479c717a561Smaybee dmu_buf_impl_t *db = dr->dr_dbuf; 480c717a561Smaybee uint64_t txg = dr->dr_txg; 481fa9e4066Sahrens 482b24ab676SJeff Bonwick if (db->db_level != 0) 483b24ab676SJeff Bonwick dnode_undirty_dbufs(&dr->dt.di.dr_children); 484b24ab676SJeff Bonwick 485fa9e4066Sahrens mutex_enter(&db->db_mtx); 486fa9e4066Sahrens /* XXX - use dbuf_undirty()? */ 487c717a561Smaybee list_remove(list, dr); 488c717a561Smaybee ASSERT(db->db_last_dirty == dr); 489c717a561Smaybee db->db_last_dirty = NULL; 490c717a561Smaybee db->db_dirtycnt -= 1; 491fa9e4066Sahrens if (db->db_level == 0) { 4920a586ceaSMark Shellenbaum ASSERT(db->db_blkid == DMU_BONUS_BLKID || 493c717a561Smaybee dr->dt.dl.dr_data == db->db_buf); 494c717a561Smaybee dbuf_unoverride(dr); 495d2b3cbbdSJorgen Lundman } else { 496d2b3cbbdSJorgen Lundman mutex_destroy(&dr->dt.di.dr_mtx); 497d2b3cbbdSJorgen Lundman list_destroy(&dr->dt.di.dr_children); 498fa9e4066Sahrens } 499c717a561Smaybee kmem_free(dr, sizeof (dbuf_dirty_record_t)); 500b24ab676SJeff Bonwick dbuf_rele_and_unlock(db, (void *)(uintptr_t)txg); 501fa9e4066Sahrens } 502c717a561Smaybee } 503fa9e4066Sahrens 504c717a561Smaybee static void 505c717a561Smaybee dnode_sync_free(dnode_t *dn, dmu_tx_t *tx) 506c717a561Smaybee { 507c717a561Smaybee int txgoff = tx->tx_txg & TXG_MASK; 508c717a561Smaybee 509c717a561Smaybee ASSERT(dmu_tx_is_syncing(tx)); 510c717a561Smaybee 511cdb0ab79Smaybee /* 512cdb0ab79Smaybee * Our contents should have been freed in dnode_sync() by the 513cdb0ab79Smaybee * free range record inserted by the caller of dnode_free(). 514cdb0ab79Smaybee */ 515fb09f5aaSMadhav Suresh ASSERT0(DN_USED_BYTES(dn->dn_phys)); 516cdb0ab79Smaybee ASSERT(BP_IS_HOLE(dn->dn_phys->dn_blkptr)); 517cdb0ab79Smaybee 518c717a561Smaybee dnode_undirty_dbufs(&dn->dn_dirty_records[txgoff]); 5191934e92fSmaybee dnode_evict_dbufs(dn); 520ea8dc4b6Seschrock 521ea8dc4b6Seschrock /* 522ea8dc4b6Seschrock * XXX - It would be nice to assert this, but we may still 523ea8dc4b6Seschrock * have residual holds from async evictions from the arc... 524ea8dc4b6Seschrock * 52555434c77Sek * zfs_obj_to_path() also depends on this being 52655434c77Sek * commented out. 52755434c77Sek * 528ea8dc4b6Seschrock * ASSERT3U(refcount_count(&dn->dn_holds), ==, 1); 529ea8dc4b6Seschrock */ 530fa9e4066Sahrens 531fa9e4066Sahrens /* Undirty next bits */ 532fa9e4066Sahrens dn->dn_next_nlevels[txgoff] = 0; 533fa9e4066Sahrens dn->dn_next_indblkshift[txgoff] = 0; 534c543ec06Sahrens dn->dn_next_blksz[txgoff] = 0; 535fa9e4066Sahrens 536fa9e4066Sahrens /* ASSERT(blkptrs are zero); */ 537fa9e4066Sahrens ASSERT(dn->dn_phys->dn_type != DMU_OT_NONE); 538fa9e4066Sahrens ASSERT(dn->dn_type != DMU_OT_NONE); 539fa9e4066Sahrens 540fa9e4066Sahrens ASSERT(dn->dn_free_txg > 0); 541fa9e4066Sahrens if (dn->dn_allocated_txg != dn->dn_free_txg) 54243466aaeSMax Grossman dmu_buf_will_dirty(&dn->dn_dbuf->db, tx); 543fa9e4066Sahrens bzero(dn->dn_phys, sizeof (dnode_phys_t)); 544fa9e4066Sahrens 545fa9e4066Sahrens mutex_enter(&dn->dn_mtx); 546fa9e4066Sahrens dn->dn_type = DMU_OT_NONE; 547fa9e4066Sahrens dn->dn_maxblkid = 0; 548fa9e4066Sahrens dn->dn_allocated_txg = 0; 549758f6e0bSgw dn->dn_free_txg = 0; 5500a586ceaSMark Shellenbaum dn->dn_have_spill = B_FALSE; 551fa9e4066Sahrens mutex_exit(&dn->dn_mtx); 552fa9e4066Sahrens 553ea8dc4b6Seschrock ASSERT(dn->dn_object != DMU_META_DNODE_OBJECT); 554fa9e4066Sahrens 555fa9e4066Sahrens dnode_rele(dn, (void *)(uintptr_t)tx->tx_txg); 556fa9e4066Sahrens /* 557fa9e4066Sahrens * Now that we've released our hold, the dnode may 558fa9e4066Sahrens * be evicted, so we musn't access it. 559fa9e4066Sahrens */ 560fa9e4066Sahrens } 561fa9e4066Sahrens 562fa9e4066Sahrens /* 563c717a561Smaybee * Write out the dnode's dirty buffers. 564fa9e4066Sahrens */ 565c717a561Smaybee void 566c717a561Smaybee dnode_sync(dnode_t *dn, dmu_tx_t *tx) 567fa9e4066Sahrens { 568fa9e4066Sahrens dnode_phys_t *dnp = dn->dn_phys; 569c717a561Smaybee int txgoff = tx->tx_txg & TXG_MASK; 570c717a561Smaybee list_t *list = &dn->dn_dirty_records[txgoff]; 57114843421SMatthew Ahrens static const dnode_phys_t zerodn = { 0 }; 5720a586ceaSMark Shellenbaum boolean_t kill_spill = B_FALSE; 573fa9e4066Sahrens 574fa9e4066Sahrens ASSERT(dmu_tx_is_syncing(tx)); 575fa9e4066Sahrens ASSERT(dnp->dn_type != DMU_OT_NONE || dn->dn_allocated_txg); 57614843421SMatthew Ahrens ASSERT(dnp->dn_type != DMU_OT_NONE || 57714843421SMatthew Ahrens bcmp(dnp, &zerodn, DNODE_SIZE) == 0); 5789c9dc39aSek DNODE_VERIFY(dn); 579c543ec06Sahrens 580c717a561Smaybee ASSERT(dn->dn_dbuf == NULL || arc_released(dn->dn_dbuf->db_buf)); 581fa9e4066Sahrens 58214843421SMatthew Ahrens if (dmu_objset_userused_enabled(dn->dn_objset) && 58314843421SMatthew Ahrens !DMU_OBJECT_IS_SPECIAL(dn->dn_object)) { 5840a586ceaSMark Shellenbaum mutex_enter(&dn->dn_mtx); 5850a586ceaSMark Shellenbaum dn->dn_oldused = DN_USED_BYTES(dn->dn_phys); 5860a586ceaSMark Shellenbaum dn->dn_oldflags = dn->dn_phys->dn_flags; 58714843421SMatthew Ahrens dn->dn_phys->dn_flags |= DNODE_FLAG_USERUSED_ACCOUNTED; 5880a586ceaSMark Shellenbaum mutex_exit(&dn->dn_mtx); 58906e0070dSMark Shellenbaum dmu_objset_userquota_get_ids(dn, B_FALSE, tx); 59014843421SMatthew Ahrens } else { 59114843421SMatthew Ahrens /* Once we account for it, we should always account for it. */ 59214843421SMatthew Ahrens ASSERT(!(dn->dn_phys->dn_flags & 59314843421SMatthew Ahrens DNODE_FLAG_USERUSED_ACCOUNTED)); 59414843421SMatthew Ahrens } 59514843421SMatthew Ahrens 596fa9e4066Sahrens mutex_enter(&dn->dn_mtx); 597fa9e4066Sahrens if (dn->dn_allocated_txg == tx->tx_txg) { 598fa9e4066Sahrens /* The dnode is newly allocated or reallocated */ 599fa9e4066Sahrens if (dnp->dn_type == DMU_OT_NONE) { 600fa9e4066Sahrens /* this is a first alloc, not a realloc */ 601fa9e4066Sahrens dnp->dn_nlevels = 1; 602da03de99SMark Maybee dnp->dn_nblkptr = dn->dn_nblkptr; 603fa9e4066Sahrens } 604fa9e4066Sahrens 605fa9e4066Sahrens dnp->dn_type = dn->dn_type; 606fa9e4066Sahrens dnp->dn_bonustype = dn->dn_bonustype; 607fa9e4066Sahrens dnp->dn_bonuslen = dn->dn_bonuslen; 608fa9e4066Sahrens } 609c717a561Smaybee ASSERT(dnp->dn_nlevels > 1 || 610f676ed34Sahrens BP_IS_HOLE(&dnp->dn_blkptr[0]) || 6115d7b4d43SMatthew Ahrens BP_IS_EMBEDDED(&dnp->dn_blkptr[0]) || 612f676ed34Sahrens BP_GET_LSIZE(&dnp->dn_blkptr[0]) == 613f676ed34Sahrens dnp->dn_datablkszsec << SPA_MINBLOCKSHIFT); 6145d7b4d43SMatthew Ahrens ASSERT(dnp->dn_nlevels < 2 || 6155d7b4d43SMatthew Ahrens BP_IS_HOLE(&dnp->dn_blkptr[0]) || 6165d7b4d43SMatthew Ahrens BP_GET_LSIZE(&dnp->dn_blkptr[0]) == 1 << dnp->dn_indblkshift); 617f676ed34Sahrens 6182acef22dSMatthew Ahrens if (dn->dn_next_type[txgoff] != 0) { 6192acef22dSMatthew Ahrens dnp->dn_type = dn->dn_type; 6202acef22dSMatthew Ahrens dn->dn_next_type[txgoff] = 0; 6212acef22dSMatthew Ahrens } 6222acef22dSMatthew Ahrens 6232acef22dSMatthew Ahrens if (dn->dn_next_blksz[txgoff] != 0) { 624c543ec06Sahrens ASSERT(P2PHASE(dn->dn_next_blksz[txgoff], 625fa9e4066Sahrens SPA_MINBLOCKSIZE) == 0); 626f676ed34Sahrens ASSERT(BP_IS_HOLE(&dnp->dn_blkptr[0]) || 627cdb0ab79Smaybee dn->dn_maxblkid == 0 || list_head(list) != NULL || 628347a31bcSahrens dn->dn_next_blksz[txgoff] >> SPA_MINBLOCKSHIFT == 629bf16b11eSMatthew Ahrens dnp->dn_datablkszsec || 63086714001SSerapheim Dimitropoulos !range_tree_is_empty(dn->dn_free_ranges[txgoff])); 631fa9e4066Sahrens dnp->dn_datablkszsec = 632c543ec06Sahrens dn->dn_next_blksz[txgoff] >> SPA_MINBLOCKSHIFT; 633c543ec06Sahrens dn->dn_next_blksz[txgoff] = 0; 634fa9e4066Sahrens } 635fa9e4066Sahrens 6362acef22dSMatthew Ahrens if (dn->dn_next_bonuslen[txgoff] != 0) { 6371934e92fSmaybee if (dn->dn_next_bonuslen[txgoff] == DN_ZERO_BONUSLEN) 6381934e92fSmaybee dnp->dn_bonuslen = 0; 6391934e92fSmaybee else 6401934e92fSmaybee dnp->dn_bonuslen = dn->dn_next_bonuslen[txgoff]; 6411934e92fSmaybee ASSERT(dnp->dn_bonuslen <= DN_MAX_BONUSLEN); 6421934e92fSmaybee dn->dn_next_bonuslen[txgoff] = 0; 6431934e92fSmaybee } 6441934e92fSmaybee 6452acef22dSMatthew Ahrens if (dn->dn_next_bonustype[txgoff] != 0) { 646ad135b5dSChristopher Siden ASSERT(DMU_OT_IS_VALID(dn->dn_next_bonustype[txgoff])); 6470a586ceaSMark Shellenbaum dnp->dn_bonustype = dn->dn_next_bonustype[txgoff]; 6480a586ceaSMark Shellenbaum dn->dn_next_bonustype[txgoff] = 0; 6490a586ceaSMark Shellenbaum } 6500a586ceaSMark Shellenbaum 65143466aaeSMax Grossman boolean_t freeing_dnode = dn->dn_free_txg > 0 && 65243466aaeSMax Grossman dn->dn_free_txg <= tx->tx_txg; 65343466aaeSMax Grossman 6540a586ceaSMark Shellenbaum /* 655e6518318SMatthew Ahrens * Remove the spill block if we have been explicitly asked to 656e6518318SMatthew Ahrens * remove it, or if the object is being removed. 6570a586ceaSMark Shellenbaum */ 658e6518318SMatthew Ahrens if (dn->dn_rm_spillblk[txgoff] || freeing_dnode) { 659e6518318SMatthew Ahrens if (dnp->dn_flags & DNODE_FLAG_SPILL_BLKPTR) 6600a586ceaSMark Shellenbaum kill_spill = B_TRUE; 6610a586ceaSMark Shellenbaum dn->dn_rm_spillblk[txgoff] = 0; 6620a586ceaSMark Shellenbaum } 6630a586ceaSMark Shellenbaum 6642acef22dSMatthew Ahrens if (dn->dn_next_indblkshift[txgoff] != 0) { 665fa9e4066Sahrens ASSERT(dnp->dn_nlevels == 1); 666fa9e4066Sahrens dnp->dn_indblkshift = dn->dn_next_indblkshift[txgoff]; 667fa9e4066Sahrens dn->dn_next_indblkshift[txgoff] = 0; 668fa9e4066Sahrens } 669fa9e4066Sahrens 670fa9e4066Sahrens /* 671fa9e4066Sahrens * Just take the live (open-context) values for checksum and compress. 672fa9e4066Sahrens * Strictly speaking it's a future leak, but nothing bad happens if we 673fa9e4066Sahrens * start using the new checksum or compress algorithm a little early. 674fa9e4066Sahrens */ 675fa9e4066Sahrens dnp->dn_checksum = dn->dn_checksum; 676fa9e4066Sahrens dnp->dn_compress = dn->dn_compress; 677fa9e4066Sahrens 678fa9e4066Sahrens mutex_exit(&dn->dn_mtx); 679fa9e4066Sahrens 6800a586ceaSMark Shellenbaum if (kill_spill) { 68143466aaeSMax Grossman free_blocks(dn, &dn->dn_phys->dn_spill, 1, tx); 6820a586ceaSMark Shellenbaum mutex_enter(&dn->dn_mtx); 6830a586ceaSMark Shellenbaum dnp->dn_flags &= ~DNODE_FLAG_SPILL_BLKPTR; 6840a586ceaSMark Shellenbaum mutex_exit(&dn->dn_mtx); 6850a586ceaSMark Shellenbaum } 6860a586ceaSMark Shellenbaum 687fa9e4066Sahrens /* process all the "freed" ranges in the file */ 688bf16b11eSMatthew Ahrens if (dn->dn_free_ranges[txgoff] != NULL) { 689bf16b11eSMatthew Ahrens dnode_sync_free_range_arg_t dsfra; 690bf16b11eSMatthew Ahrens dsfra.dsfra_dnode = dn; 691bf16b11eSMatthew Ahrens dsfra.dsfra_tx = tx; 692738e2a3cSPaul Dagnelie dsfra.dsfra_free_indirects = freeing_dnode; 693738e2a3cSPaul Dagnelie if (freeing_dnode) { 694738e2a3cSPaul Dagnelie ASSERT(range_tree_contains(dn->dn_free_ranges[txgoff], 695738e2a3cSPaul Dagnelie 0, dn->dn_maxblkid + 1)); 696738e2a3cSPaul Dagnelie } 697cdb0ab79Smaybee mutex_enter(&dn->dn_mtx); 698bf16b11eSMatthew Ahrens range_tree_vacate(dn->dn_free_ranges[txgoff], 699bf16b11eSMatthew Ahrens dnode_sync_free_range, &dsfra); 700bf16b11eSMatthew Ahrens range_tree_destroy(dn->dn_free_ranges[txgoff]); 701bf16b11eSMatthew Ahrens dn->dn_free_ranges[txgoff] = NULL; 702cdb0ab79Smaybee mutex_exit(&dn->dn_mtx); 703fa9e4066Sahrens } 7041934e92fSmaybee 70543466aaeSMax Grossman if (freeing_dnode) { 706af346df5SNed Bass dn->dn_objset->os_freed_dnodes++; 707c717a561Smaybee dnode_sync_free(dn, tx); 708c717a561Smaybee return; 709fa9e4066Sahrens } 710fa9e4066Sahrens 711e503a685SGeorge Wilson if (dn->dn_next_nlevels[txgoff]) { 712e503a685SGeorge Wilson dnode_increase_indirection(dn, tx); 713e503a685SGeorge Wilson dn->dn_next_nlevels[txgoff] = 0; 714e503a685SGeorge Wilson } 715e503a685SGeorge Wilson 716da03de99SMark Maybee if (dn->dn_next_nblkptr[txgoff]) { 717da03de99SMark Maybee /* this should only happen on a realloc */ 718da03de99SMark Maybee ASSERT(dn->dn_allocated_txg == tx->tx_txg); 719da03de99SMark Maybee if (dn->dn_next_nblkptr[txgoff] > dnp->dn_nblkptr) { 720da03de99SMark Maybee /* zero the new blkptrs we are gaining */ 721da03de99SMark Maybee bzero(dnp->dn_blkptr + dnp->dn_nblkptr, 722da03de99SMark Maybee sizeof (blkptr_t) * 723da03de99SMark Maybee (dn->dn_next_nblkptr[txgoff] - dnp->dn_nblkptr)); 724da03de99SMark Maybee #ifdef ZFS_DEBUG 725da03de99SMark Maybee } else { 726da03de99SMark Maybee int i; 727da03de99SMark Maybee ASSERT(dn->dn_next_nblkptr[txgoff] < dnp->dn_nblkptr); 728da03de99SMark Maybee /* the blkptrs we are losing better be unallocated */ 729da03de99SMark Maybee for (i = dn->dn_next_nblkptr[txgoff]; 730da03de99SMark Maybee i < dnp->dn_nblkptr; i++) 731da03de99SMark Maybee ASSERT(BP_IS_HOLE(&dnp->dn_blkptr[i])); 732da03de99SMark Maybee #endif 733da03de99SMark Maybee } 734da03de99SMark Maybee mutex_enter(&dn->dn_mtx); 735da03de99SMark Maybee dnp->dn_nblkptr = dn->dn_next_nblkptr[txgoff]; 736da03de99SMark Maybee dn->dn_next_nblkptr[txgoff] = 0; 737da03de99SMark Maybee mutex_exit(&dn->dn_mtx); 738da03de99SMark Maybee } 739da03de99SMark Maybee 74046e1baa6SMatthew Ahrens dbuf_sync_list(list, dn->dn_phys->dn_nlevels - 1, tx); 741fa9e4066Sahrens 74214843421SMatthew Ahrens if (!DMU_OBJECT_IS_SPECIAL(dn->dn_object)) { 743c717a561Smaybee ASSERT3P(list_head(list), ==, NULL); 744c717a561Smaybee dnode_rele(dn, (void *)(uintptr_t)tx->tx_txg); 745fa9e4066Sahrens } 746c717a561Smaybee 747c717a561Smaybee /* 748c717a561Smaybee * Although we have dropped our reference to the dnode, it 749c717a561Smaybee * can't be evicted until its written, and we haven't yet 750c717a561Smaybee * initiated the IO for the dnode's dbuf. 751c717a561Smaybee */ 752fa9e4066Sahrens } 753